With the correct configuration of your campaign, it is impossible for search engines to find out you buying links. Of course some things must be considered. It is inter alia not recommended, just buying high PageRank links, as this would not simulate the natural backlink ratio as it should. We also recommend to put in various keyword combinations for your main keyword. A too fast link building can also lead to a site-gradation. With 5 to 10 links per day, you should be on the safe side. A value of about 50 links per day can be dangerous. If you are not sure whether your campaign is set up correctly, you can of course contact us by ticket and we will gladly advise you in this regard.